Door to door sales and managing street vendors is considered as the most difficult discipline. However with method and a lot of determination, you will be sure to succeed in selling just by using Smart SELLER:
SMART SELLER (Door to door sales system) is a system dedicated to street vendors:
59% of leading companies provide their sales representatives with a 360-degree view of customers, including their purchasing history on a mobile device, in order to provide a rapid response to customer requests and improve satisfaction.
Source Etude AberdeenGroup